For the 2 most recent infants to start, we established the full time start date, and I offered to do part days the week before to help them ease in. I charge $35 for full day. So I charge $50 for 3 days: day one was the last hour of the day, day 2 was short day (left after lunch, before nap) and day 3 was full day. I didn't mind because the space would've been empty anyways, so it was extra money for me, and the parents seemed to appreciate the transition.